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-   -   Help with gear ratio and speedo gears.. (https://www.jeepforum.com/forum/f9/help-gear-ratio-speedo-gears-558070/)

simplybao 05-13-2008 03:58 PM

Help with gear ratio and speedo gears..
 
I think that I have 3.07 gears but am not sure. Here's a link to the tag that is on the front differential cover.

Assuming that I have 3.07 gears which speedo gear do I need to get? I'm running 31x10.5 BFG's. Based on

http://www.4x4xplor.com/speedo.html

It looks like I need part number 52067627 i.e. 27 teeth

This is the tag on then diff cover: http://kevinkramer.net/bao/diff_tag.jpg

Todd4a 05-13-2008 04:16 PM

Looks like a 3.07 to me.

Jerry Bransford 05-13-2008 04:19 PM

Yep, a 27 tooth is what you want and the tag confirms you're running 3.07 axles. :)

simplybao 05-13-2008 04:53 PM

SWEET! Thanks for all the responses. So now my question is, I see alot of people re-gearing to 4.10 and higher. Is it worth it for me to re-gear? I may be just mis-informed but isn't a 3.07 not very desireable?

Jerry Bransford 05-13-2008 05:07 PM

A 3.07 ratio generally makes a Jeep a real dog. Regearing is a commonly done thing that can completely transform a Jeep once bigger tires are added. However, at the $1200-1300 it typically costs, you don't want to spend the $$$ until you're at a tire size that you think you'll be staying at for a while. For 31" tires, I don't think I'd regear yet. But if you get tires bigger than that, then it's time to regear to a lower ratio. Auto trannies are far more forgiving of mismatched tires sizes and ratios so if you're fortunate enough to have an auto, that will help. :)

simplybao 05-13-2008 05:59 PM

Cool, thanks for the guidance!!! I have a requirement to stay at my 2" lift and 31's...the other half has dictated no higher :brickwall :brickwall

But I've been contemplating getting Rubicon axles for front and rear so if I did that, then I'd get them with 4.10's.....


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